Door-check



(Model.)

P. K. OLALLY.

DOOR GHBGK.

Patented Deo. 4, 1883.

UNITED STATES PATENT OFFICE.

PATRICK K. OLALLY, OF BOSTON, MASSACHUSETTS.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 289,697, dated December 4, 1883.

Application filed January 30, 1883.

To @ZZ whom, it may concern,.-

Be it known that LPATRIGK K. OLALLY, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Automatic Door-Checks, of

which the following is a specication.

This invention consists in an appliance for checking or preventing a door from slamming or rattling when it is closed against its j amb or casing, said appliance being composed, chiefly, of a spring-retracted arm adapted to slide in a socket in or upon the door-casing in a line at right angles tothe door when the latter is closed, said arm being adapted, when pulled outwardly against the force of its spring, to depend or hang downwardly at its outer end and present a yielding buffer or check to a projection on the door, said projection striking the depending portion, which has a yield.- ing character imparted to it by its retractingspring, and therefore yields and prevents a shock or jar of the door, and at the same time gives an outward motion to the horizontal portion of said arm, whereby the same is disengaged from a locking device, which holds it in position, and is thereby released. This movement causes the depending lportion of the arm to assume a horizontal position, which engages a lug on said portion with the prof jection on the door, so that when the door is again opened the arm is drawn outwardly and set for action by the force exerted in opening the door, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure l represents a perspective view of a portion of a door and its casing provided with my improved appliance, the door being closed and held. Fig. 2 represents a perspective view of the same parts, the door being opened and the checking appliance set for action. Fig. 3 represents a horizontal section, showing the parts in the same position as in Fig. 2. Fig. 4 represents a section on line x x, Fig. 2. Figs. 5, (i, and 7 represent views of parts in detail.

The same letters of reference indicate the same parts in all the figures.

In the drawings, A represents a door, and B the jamb or casingthereof. The door is provided on its outer surface and near its swinging edge with a projection, C, adapted to slide vertically in a slotted box or guide, D, attached to the door, and provided with a (Model.)

yielding rubber collar, C, on its outer end, which projects beyond the outer edge of the door, said collar being for the purpose of relieving the jar ofthe impact of the door against the device hereinafter described when the door closes. Attached to the jamb is a block or projection, E, in which slides a jointed arm, F, having at its outer end a lug, H, adapted to engage with the projection C, as hereinafter described. The arm F is normally drawn into the jamb by a spring, I, suitably arranged to exert a constant drawing force on said arm. In the present instance the spring is arranged at right angles to the arm F in a tubular vertical case, J attached to the j amb, and exerts a downward pressure on a plunger, K, in said case, the plunger being connected by a chain, L, passing over a pulley, M, with the arm F, so that the downward pressure oi' the springen the plunger draws the arm F inwardly. If desired, however, the spring may be arranged horizontally in line with the arm F. The arm F is composed of two parts, 2 3, pivoted together or jointed at 4., so that the outer part, 3, which supports the lug H, can swing downwardly when the arm is sufficiently withdrawn from the projectionfE, as shown in Fig. 2.

N represents a hollow casing attached to the projection E. Said casing has an orice, through which the arm F passes, and athreesided projection or guide, I), in which said arm slides, said projection having in one side a notch, R. Within the casing N is acatch or i dog, S, supported by a spring, T, which presses said catch downwardly and permits itto move sidewise. The upper surface of the -inner part, 2, of the larm F is provided with a pocket, U, adapted to coincide with and receive the catch or dog S when the arm F is drawn out from the casing, and thus lock the arm in its outwardly-drawn position.

a represents a longitudinal groove in the upper surface of the part 2 of the arm F, extending from the outer end of said part to the pocket U. b represents an inclined recess in the part 2, the deeper end of which is located behind and beside the pocket II, the bottom of said recess being inclinedl upwardly to the.

outer end of the part 2, as showninvFig. 5.

d represents a lever pivoted at e in the hollow lug H, and connected at its swinging end with a rod, f, which extends through the part 3 ofthe arm E, and has a hook, f', at its outer IOO end, adapted to engage the notehR in the prodog or catch S is gradually raised by the injection or guide l?. A spring, f, surrounding the rod f, holds the latter normally in the position shown in Fig. 2.

The operation of the described parts is as follows: Suppose the door to be closed and the projection C on the door to be pressed by the lug H of the arm F against the casing N by the spring I, the arm F being drawn into the casing as far as possible. Vhen the door is next opened, the force applied to open it causes the projection C (which bears against the inner vertical side of the lug H) to draw the arm F outwardly against the pressure of the spring I. During the outward movement `of the arm F the hook f on the rod f engages with the outer side of the notch or slot R in the fixed projection P, and is arrested thereby, so that the continued outward movement of the arm F causes the lever d to swing through a slot in the inner face of the lug H and present an inclined surface to the projection C, as shown in Fig. 7, said inclined surface preventing the projection from binding on or resisting the downward movement of the lug and part 3, so that Ythelatter drops from ahorizontal to a vertical or inclined position, as shown in Fig. 2, the part 3 of the arm being now drawn entirely out from the projection I?, so that it can swing downwardly on its pivot, as shown in Fig. 2. At the same moment that the part 3 drops, the dog or catch S, which during the outward movement of the arm was guided by the groove a, drops into the pocket U,and thuslocks the arm in the position shown in Fig. 2, and the projection C on the door drops to the lower end of the box or guide D. rlhe arm F is now set for action and the door is free. W'hen the door is again closed, the depressed projection C strikes the lower portion of the part 3 of the arm F just above the lug H and below a fulcrum, HQ projecting from the easing N, and the part 3 yields to the impact of the door, and is thus caused to tilt on said fulcrum H, the spring I yielding and permitting the part 2 to move outwardly as far as required bythe tilting of the part 3. It will be seen, therefore, that the arm F and its spring constitute a yielding buffer or check, which prevents a. jar or shock when the door closes. The outward movement of the part 2, caused by the tilting of the part 3, causes the beveled rear side of the pocket U to exert an upward pressure on the correspondingly-beveled rear side of the dog or catch S, and lift the latter out of the pocket and cause it to drop into the deeper part of the inclined recess b, behind the pocket. The arm F is therefore unlocked and its spring pulls it inwardly, the part 3 of the arm being thus caused to assume its horizontal position and engage the projection C on the door by means of the lug H, which rises behind the projection C and raises the latter to the position shown in Fig. 1. The arm is therefore ready to be again setv for action by the opening of the door. Dur" ing the inward movement of the arm F thc clined bottom of the recess Z) until its point is flush with the upper surface of the arm F, when its spring T moves it laterally into the groove a, whereby it is guided into the pocket U during the next outward movement of the arm F. rlhe same operations are repeated every time the door is opened and closed. It will be seen that the covering G on the projection C constitutes a spring that co-operates with the spring I in relieving the shock or jar of the door when it closes.

I prefer to provide the slotted box or guide D with blocks of rubber, D2 D2, at its upper and lower ends, to prevent the sliding projection C from rattling against the ends of said guide.

If desired, the fulerum H may be vertically adjustable, so as to regulate the power exerted by the door on the depending part of the arm F.

The slotted block D, instead of being attached to the outer side of the door, may be placed in a recess or mortise in the edge of the door, like a mortise-lock. In such case the arm F and the co-operating parts should be correspondingly set back in the jamb.

The door is closed by a spring, S2, of any suitable construction.

I claiml. The combination of a door having a vertically-movable projection, a check composed of aj ointed sliding spring-retracted arm adapted to be set for action by the force applied to open the door, a locking device or dog adapted to automatically secure the check in position for action, and a fulcrum, H, whereby when the door is closed said arm is caused to exert an outward pull on its spring, and thereby yield to the door, and at the same time disengage the locking device and permit the spring to retract the arm and hold it in position to' be again set for action by the opening of the door, as set forth.

2. The combination, with the door having the vertically-movable projection C, of the spring-retracted jointed sliding arm F, havcatch S, adapted to lock the arm F when it is drawn outwardly, a device, d, for disengaging the projection C from the lug H, means, substantially as described ,for operating said disengaging device al simultaneously with the locking of the arm F by the dog S, and the inclined recess b in the arm F, whereby when said arm is moved outwardly by the impact of the closing door said dog is disengaged from the arm and prevented from again engaging it until after an inward and outward movement of the arm, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 22d day of January, 1883.

Witnesses:

C. F. BROWN, y A. L. VHITE.

IATRICK K, OLALLY.

ing a lug, H, and automatic locking dog or IOO 

